Disable assistant when I use fingerprint sensor

So, I have a Moto G5S+ which has a fingerprint sensor and I love it, it's super handy and useful to unlock apps and do payments. Problem is: when I keep it touched for too long, the app is minimized, home screen appears and - sometimes - google assistant pops up. This messes up with what I am doing, that is, authenticating on an app.

Is there a way to disable show-on-screen when fingerprint is keep touched? I never ever use this feature and it's only bothering.

I tried disabling "lock screen with fingerprint sensor", but naturally it has no impact on showing the home screen.